An oxidative trimerization of catechol and its derivatives affords triphenylene derivatives. Under these electrochemical conditions, overoxidation results in precipitation of a radical cation pair of triphenylenes with a counter anion, which prevents efficient synthesis. A reductive workup strategy, in which the precipitate is peeled from the electrodes, affords the trimer in good yield. Furthermore, alternating current (AC) electrolysis provides a convenient synthesis without any precipitation.
- Alternating current electrolysis
- Electrochemical synthesis
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